\begin{table}[b]
	\centering
	\begin{minipage}[t]{0.95\linewidth} % 如果想在表格中使用脚注，minipage是个不错的办法
		\caption{IMChecker方法评测结果}
		\label{tab:3-4-imchecker}
		\begin{tabular}{@{\extracolsep{4pt}}cccccccccc@{}}
			\hline
			\multirow{2}{*}{类别 } & \multirow{2}{*}{个数} & \multicolumn{4}{c}{IMChecker} & \multicolumn{4}{c}{IMChecker-~-} \\
			\cline{3-6} \cline{7-10}
			 & & 报告数 & TP\footnote{TP：真实缺陷数目} & P(\%) & R(\%) & 报告数 & TP& P(\%) & R(\%) \\
			 \hline
			 IPU & 510 & 490 & 423 & 86.33 & 82.94 & 745 & 469 & 62.95 & 91.96 \\
			 IEH & 612 & 580 & 506 & 87.24 & 82.68 & 677 & 526 & 77.70 & 85.94 \\
			 ICC & 1050 & 1012 & 878 & 86.76 & 83.62 & 1320 & 898 & 68.03 & 85.52 \\
			 总计 & 2172 &  2082 & 1807 & 86.79 & 83.20 & 2742 & 1893 & 69.04 & 87.15 \\
			\hline
		\end{tabular}
	\end{minipage}
\end{table}